KEV Entry

CVE-2018-8639

Known Exploited Vulnerability Entry CISA

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Entry Details
Confirmed Exploited

CVE-2018-8639

2025-03-03 01:00 CET

Timestamps

2025-03-03

2025-03-03

Scope

Microsoft Windows Win32k Improper Resource Shutdown or Release Vulnerability | Affected: Microsoft / Windows | Description: Microsoft Windows Win32k contains an improper resource shutdown or release vulnerability that allows for local, authenticated privilege escalation. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. | Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. | Due date: 2025-03-24 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2018-8639 ; https://nvd.nist.gov/vuln/detail/CVE-2018-8639

References
  • {'id': 'CVE-2018-8639', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-8639'}

7e8ae147-8ee3-4d76-ab20-0ea25757652c

CISA
405284c2-e461-4670-8979-7fd2c9755a60

2026-10-02 08:09 CEST

2026-10-02 08:09 CEST

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-404"
  ],
  "date_added": "2025-03-03",
  "due_date": "2025-03-24",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Known",
  "product": "Windows",
  "vendorProject": "Microsoft",
  "vulnerabilityName": "Microsoft Windows Win32k Improper Resource Shutdown or Release Vulnerability"
}
 -
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